Refrigerating apparatus



Dec. 1, 1931. H. s. HULL 3 I 1,833,944

REFRIGERATING APPARATUS Filed Dec. 22, 1927 4 4'7 7 o 59 HI 38 35 55 22 u 5 ll.- 5 43 4 Patented Dec. 1, 1931 UNITED STATES PATN'F orricr.

HARRY B. HULL, or DAYTON, omo, assrenon, BY MIESNE assiemmvrs, 'ro

FBIG

AIRE CORPORATION, CORPORATION OF DELAWARE BEFBIGERATING APPARATUS. I

Application filed December 22, 1927. semi menses.

This invention relates to a refrigerating system in which there is a refrigerating circuit having portions operating under differ, ent refrigerant pressures. A ortion of the circuit is maintained ata definite pressure differential with respect to the atmosphere, and the other portions of the circuit may operate under a pressure determined by the operation of the pumping mechanism, which pressure may be different from the first-mentioned pressure.

The invention also relates to a method of I operating a refrigerating system by means of without causing atmospheric pressure without causing condensation of atmospheric humidity on certain parts of the system.

An object of this invention is to provide a refrigerating system of the character hereinbefore described havin a pressure regulating means which is not affected by the humidity of the atmosphere, and on which the condensation of said humidity eration of the device.

Another object of this invention is to pro vide a refrigerating system having an expansion controlling device which may be affected by the pressure of the atmosphere, and which is not affected by the humidity thereof.

Another object of this invention is to pro- Vide an expansion valve for a refrigerating system having pressure responsive actuating means affected by the pressure of the atmos phere but not by the humidity thereof.

Another object of this invention is to provide a method of operation of a refrigerating system by means of atmospheric pressure condensation of atmospheric humidity on certain parts of the system. Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of embodiment of the present invention is clearly shown.

In the drawings: m

Fig. Lshows diagrammatically a refrigerating system embodying my invention;

Fig. 2 is pansion member embodying my invention.

A- refrigerating system according to my the expansion will not affect the op- .justing means such as cor ance with the pressure a cross sectional view of an exinven'tion'may comprise a compressor discharging into a condenser 21 which feeds refrigerant thru a line vice 23. .The expanded refrigerant from device passes thru a pipe 24 to an evaporator 25 from which the evaporated refrigerant passes thru a pipe 26 back to the compressor 20. The operation compressor 20 may be controlled by thermostatic means, such as a thermostatic bulb 27 operating an expansible bellows 28, which operates snap switch 29 for starting and stopping motor 50 of the compressor 20.

22 to an expansion deof the The expansion means 23 may comprise a a casing 30provided with inlet 31 and outlet 32' for the refrigerant. The inlet 31 may discharge thru an orifice 33 into a'chamber 34 which in turn discharges into outlet 32. Orifice 33 may be governed by a needle valve 35 carried byyoke 36 which may be attached to a diaphragm 37 the yoke 36 having at tached thereto a member 38 passingthru the diaphragm 37. A disc 39 may be interposed .between said member 38 and the diaphragm 37 .in order to prolong the life of the diaphragm.

a coil, spring 40 interposed between an adon wall 42 of the casing 30; Casing 30 may be provided with an extension '43. The extension 43 may carry a. very flexible but impervious diaphragm 44 protected by a cap 45 secured by bolts 45 to member 38 and resting Member 38 may carry adjustably,

nuts 41 carrie y the extension 43, said cap 45 having an orifice 46 open to the atmosphere. .In order to augment the flexibility of the diaphragm 44, it may be made as a bellows.

It will be seen that refrigerant in inlet 31 I and passing thru screen 47. is released in chamber 34 by means of the valve 35. The dia hragm 37 operates the valve 35 in acthe chamber 34 and that of a chamber 48 formed by extens1on43 The pressure in chamber 48 may be exactly orsubstantially "that of the atmosphere since the diaphragm cham- I difference between ating system and to coming within the scope of 15 f of atmospheric moisture troduction of the atmospheric humidity near the operating portion of the expansion device and thus prevents the frosting or moistening of the operated parts.

The diaphragm shown in the preferred embodiment maybe made of various substances, such as rubber or bronze or any other suitable substance which will produce a flexi- 'ble diaphragm.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understoodthat other forms might be adopted, all

olloW.

What is claimed is as follows: 1. An expansion .valve fora refrigerating system having an actuating memberresponsive to atmospheric pressure and to" the pressure of expanded refrigerant, and means for transmitting atmospheric pressure to said actuating member and for preventing the condensation or frosting of atmospheric moisture on said actuating member.

2. A valve for a refrigerating system ineluding a member operated by a'diaphragm responsive to a pressure Within the refrigeratmospheric pressure, and meansfor transmitting substantial atmospheric pressure tosaid diaphragm, said last named means preventing the circulation of the surrounding free atmospheric airtb said diaphragm.

An" expansion valve for refrigerating rctrigerat1ng system and by atmospheric mitting atmospheric pressure to said pres-.

pressure on the other side, adjusting means connectedto said pressure responsive means blc cover for said adjusting means for ,transsure responsive 'means and for preventing the condensation ,or frosti'ng of atmospheric moisture on said adjusting means.-

5. An expansion valve for refrigerating system including adiaphragm, said diaphragm being actuated by pressure Within the refrigerating system upon one side and.

being actuated by atmospheric pressure on on the atmospheric pressure side and a fl exiv opening for preventing the condensation of atmospheric moisture on means and for transmitting atmospheric pressure to said first mentioned diaphragm.

.In testimony whereof I hereto affix my signature.

HARRY B. HULL.

the claims which the other side, adjusting means on said other side connected to said diaphragn'n'a housin enclosing said adjusting mpans andsaid diaphragm, said housing having an opening to provide access to the adjusting means, and a second flexible diaphragm closing said said adjusting 

